| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,508,432,120 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
nebular hypothesis |
Also found in: Wikipedia, Hutchinson | 0.49 sec. |
|
nebular hypothesis: see solar system solar system, the sun and the surrounding planets, natural satellites , dwarf planets, asteroids, meteoroids, and comets that are bound by its gravity. The sun is by far the most massive part of the solar system, containing almost 99.9% of the system's total mass. ..... Click the link for more information. . How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | |
|---|---|---|
The presumed planet's youth challenges the conventional model of planetary formation, in which dust around a star gathers into ever-larger rocks that crash together and eventually accrete into planets. Among the projects in the planning stages are: a trip to Mars to retrieve soil samples and bring them back to Earth, a rendezvous with Pluto, an infrared telescope to examine star and planetary formation, a mission to Jupiter's mysterious moon Europa, a trip to retrieve samples from comets, and missions to look for planetary systems resembling the solar system. A previous analysis of similar data suggested the core took 60 million years to take shape, but the new estimates are in accord with several other lines of evidence, as well as the widely accepted theoretical models of planetary formation. |
| Encyclopedia |
| Free Tools: |
For surfers:
Browser extension |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|